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alan239955_st
alan239955_st
Associate II
October 11, 2015
Question

STM32F7 DISCO - LCD_INT

  • October 11, 2015
  • 1 reply
  • 648 views
Posted on October 11, 2015 at 14:47

On the STM32F7-DISCO a signal from GPIO Port I13 LCD_INT connects to the 480 x 272 LCD.

The STM32F745xx/STM32F746xx datasheet says that the AF14 mode of this pin is LCD_VSYNC. On the DISCO the LCD_VSYNC is on GPIO Port I9. So the documentation implies a duplication.

So what is this PIN? The STM32F7 Cube software sets the pin to AF14... Is the datasheet wrong and this is an interrupt input?
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    1 reply

    Nesrine M_O
    Nesrine M_O
    Associate
    November 2, 2015
    Posted on November 02, 2015 at 15:44

    Hi  lowit.alan,

    1-The STM32F745xx/STM32F746xx datasheet says that the AF14 mode of this pin is LCD_VSYNC. On the DISCO the LCD_VSYNC is on GPIO Port I9. So the documentation implies a duplication.

     

    In fact the LCD_VSYNC alternate function is mapped on the PI9 and PI13 pins, so there is no duplication

    2-This is an interrupt input?

    Yes, you are right the pin LCD_INT is an interrupt input pin.

    3-The STM32F7 Cube software sets the pin to AF14

     If you speak about the configuration of both PI9 and PI13 as AF14, please note that the issue is reported internally. 

    -Syrine-

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